All Matt has done and said makes me believe he loves OSS, freedom of the user and democratization of publishing. Why would he ruin his own creation by looking for an exit when WP is already hugely popular and more importantly why abandon what seems to be his principles around freedom/OS. I will eat my words in 5-10 years if it isn't true but I think everyone will see he will focus just as much on wp.org and freedom as he does Automattic (ie keeping as much as possible open, free alternatives (like jetpack), etc)
ALso Gutenberg is not nearly as bad as those reviews say. It is much better even only in the last few months, though a lot of UX development is needed it is a powerful editor.